Improvement in saw-swages



UNITED ST B- PATENT" OFFICE.

cALvnv ADA S, on RUSSELLSBURG, 'PENFSYLVANIA. f

IMPROVEMENT .lN sAw-swAeEs.

Specification forming part of Letters Patent No l7 7t 447 dated May 16, 1876 application filed V f L "Dccembe1'7,1l575. v

To all whom it may concern: Be it known that I, CALVIN. ADAMS, of Russellsburg, in the county of Warren and State of Pennsylvania, have invented a new and useful Improvementin' SawSharpeners;

and I do hereby declare that thefollowing'is a full and exact descriptiouof the same, ref-; erence being bad to the accompanyingidraw- U ings, and to the lettersflof reference marked thereon. The object I have in. viewis the production of a simple, convenient, and effective instrument for sharpening the teeth of saws, while such teeth are in position, without thelnse of a file; and my invention therein consists in the novel constructionand combination of the principal operative parts.

In'orderto enable, those skilled in the art to make and use my instrument, I now pro deed to describe the same, having reference to the accompanying drawings, in Which Figure 1 is a view of the whole instrument;

Fig. 2, another view, with the clasp, the key,

and one of the top plates removed, and a saw-tooth in position between the dies; Fig. 3, a central section through line armof Fig. 1; Fig. 4, separate views of the dies, and Fig. 5 a separate view of one of the plates.

7 Like letters denote corresponding partsin each figure.

In the drawings, A represents the body ofmy I instrument, which should be made ofsteel, having a handle, a, adapted to be held in the hand,

and with the outer end of the handle adapted to be struck with a hammer. preferably square in form, has fixed to its lower front end, in the mann'er hereinafter described, a plate, B, the inner surface of which extends upwardslightly from the body A to the extreme endof such plate. A portion of one side of thebody,-lettered G, ex-

tends in a tongue to the front, fitting closely The body A,

part G. i This recess extends only a little way in the tongue side 0, so as to leave shoulders,

e above said recess, but on the opposite side the recess extends nearly to the outside of the body A, leaving a broad shoulder, of, in that side. there is'inserted a case-hardened steel'die, F,

which fits closely into the cut-away part c,

tapering from its heelto itspoint, where it coincides with the line of the part 0. Another die, G, of the form shown, fits into the recess in the side opposite the die F, and fills up the 1 remaining space in suchrecess, and fits closely on its contiguous side to the die F. A covway. A clasp, I, of suitable metal, is adapted r to slip over both plates and upon the ends of the body A. A key, J, with stops g at each end, and a body out wedge-like from both ends toward the center being inserted under the clasp before the same is placed over the plates,

fits into a suitable groove, h, in the top of the body A, and, by being driven, wedges under the clasp and holds all the parts covered by the clasp firmly in position.

a It will be'observed that when the dies are in position there is included between their front ends an angular space, K, which is made to conform in outline to the shape of the upper and lower cutting-faces of the tooth to be sharpened; also, that the interior faces of the plates Band H conform to the outlines of the sides of such teeth at their cutting-faces, and I said dies and plates, being easily removable, may be ground down so as to answer for sharpening teeth of any forma It is also to be observed that these dies are interchangeable, so that this instrument may be used with vaiious sizes and sorts of dies to accommodate saws of various degrees of th ckness, and

with various sorts of teeth.

Inth e use of my instrument it is held in one hand, with the key loose and placed over.

thetooth to be sharpened, which tooth enters between the outer ends of the plates B and H,

and takes position with the upper cutting-face Into the recess onthe tongue side 0 the lower cutting-face of the tooth next to the blow or two of a hammer upon the end of the instrument, the cutting end of the tooth and cide with the sides of the tooth at all boiutS,

die G. Then the key being wedged i1 1) hyfa 1 its adjacent cutting-faces are made to assume the shapeof the recess K, but the extreme cutting end is' forced sewn into the fifgie which contract-s and sharpens such point. At the same time the covering-plates, which coinhold the same from twisting, warping, orspreading, except sofaras to assume the particular form desired for ."tlfe tooth. g

The particular advantages of my instrument are as follows: It can be used for various sizes and forms of teeth. lt'sharpens all teeth ni; i fonni p It sharpens teeth erre -Hy without injur ng tfh'e fem-per of the m e'taL a-S ii'sitiiei casein filing, 7 It lq llii l e s I16 its use, therefore dispensing with the been of eX pert filers, and is cheap and durable.

- Having thus desc fihe'd any i'n stru'nfent, I tiara new therein, and desire to aroceen by Letters Patent, is-

substantially as described.

2.. l n ajsaw-sharpener, the combination of the we r and and the states B and H, substantially as described.

3, 111a saw-sharpener, the combination of 1 the plates B and H, the dies F and G, the band I, and key J, substantially as and for tlre purgoses set forth.

say of December, 1875.

J v CALVIN ADAMS.

W i e i I CHAS.

R. YER.

J. In a, saw-sharpener, the plates B and H, 

